If you can solve any of these pls do

What happens when an acid dissolves?

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.

Johnny's bakery has 30,900 grams of sugar. a recipe calls for 32 pounds of sugar to be used. how much sugar will be left over? (1 lb=453.59 g).